Harq Hamiem Cave

Harq Hammiem Cave (Ghar Harq il-Hammiem) is the only known fully submerged terrestrial cavern in the Maltese islands. The cave has two chambers on different levels, with an interconnecting narrow corridor leading from the upper chamber to a fully submerged lower chamber. The surface of the water is at a depth of 16 metres below sea level, with maximum depth of 52 metres below sea level. The water inside the cave approximates freshwater at the surface, turns brackish with depth and has seawater characteristics at deeper levels. The cave is inhabited by the rare albino shrimp. Harq Hammiem Cave is situated on the north side of St. George’s Bay in St. Julian's.